Re: [PATCH 1/1] pretty-formats: add hard truncation, without ellipsis, options

[Taylor Blau <me@ttaylorr.com>]

On Sun, Oct 30, 2022 at 06:56:14PM +0000, Philip Oakley wrote:
> Instead of replacing with "..", replace with the empty string "",
> having adjusted the padding length calculation.
>
> Needswork:
> There are no tests for these pretty formats, before or after
> this change.

Hmmph. I see some when searching for l?trunc in
t4205-log-pretty-formats.sh. Is that coverage not sufficient for the
existing feature?

If so, it would be nice to see it bulked up to add coverage where we
are missing some. Either way, we should make sure the new code is
covered before continuing.

> @@ -1743,6 +1749,16 @@ static size_t format_and_pad_commit(struct strbuf *sb, /* in UTF-8 */
>  					    padding - 2, len - (padding - 2),
>  					    "..");
>  			break;
> +		case trunc_left_hard:
> +			strbuf_utf8_replace(&local_sb,
> +					    0, len - (padding),
> +					    "");
> +			break;
> +		case trunc_right_hard:
> +			strbuf_utf8_replace(&local_sb,
> +					    padding, len - (padding),
> +					    "");
> +			break;

If I remember correctly, strbuf_utf8_replace() supports taking NULL as
its last argument, though upon searching I couldn't find any callers
that behave that way. Can we use that instead of supplying the empty
string? If not, should we drop support for the NULL-as-last-argument?

Thanks,
Taylor